document.write( "Question 156057: Let A and B be 2 × 2 matrices. Let [ 2 3 ] and [ -4 5 ] be the first and second rows of A, respectively. Let [ 2 3 ] and [ -4 5 ] be the first and second columns of B, respectively. If C = AB, then the element c(sub 22) =\r \n" );
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document.write( "a. 41 \n" );
document.write( "b. 7 \n" );
document.write( "c. 11 \n" );
document.write( "d..21 \n" );
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